hi, i wanna sell my iphone 3gs and i am gona get a good price for it! £450..16GB, jailbreakable! First question: how much do u think the 4G iphone 16GB will be? Second question: do u think that o2 will have the offical unlock? I am with Three at the moment...i wanna be able to offically unlock the iphone and put my 3 micro-sim or cut my normal sim down. Can anyone help?